noriega



(No Model.) 2 Sheets Sheet 1.

E. NORIEGA. TELEPHONE.

No. 481,049. Patented Aug. 16, 1892.

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UNTTED STATES ATENT FFICEQ ELOY NORIEGA, OF MEXICO, MEXICO.

TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 481,049, dated August16, 1892.

Application filed June 11, 1891. Serial No. 395,888. (No model.)

To all whom it may concern.-

Be it known that I, ELOY NORIEGA, of Mexico, Mexico, have invented a newand Improved Telephone, of which the following is a specification,reference being had to the annexed drawings, forming a part thereof, inwhich Figure 1 is a longitudinal section of my improved combinedtransmitter and receiver. Fig. 2 is a sectional view of thetelephonemagnet.

Similar letters of reference indicate corresponding parts in both theviews.

The object of my invention is to construct a compact and efficienttelephone for-transmitting and receiving speech.

My invention consists in a combined transmitter and receiver formed ofan angled handle carrying at one end a microphone and at the other end amagneto-receiver, and in the combination therewith of an auxiliarytransmitter and receiver, by means of which conversation can be carriedon by two persons through one instrument.

The handle A, of vulcanite or other suitable material, contains a narrowU-shaped magnet B, provided with lateral pole-pieces 0. To the saidpole-pieces O is attached the screwthreaded ring D, to which is fittedthe metallic internally-screw-threaded ring E. To the ring E is hingedthe diaphragm-cell F, the said cell being provided at a pointdiametrically op posite the hinge with an adjusting-lever G for varyingthe distance between the polepieces 0 and the iron diaphragm H, clampedto the diaphragm-cell F by the chambered ear-piece I of the usualdescription.

Upon the pole-pieces C are placed bobbins J, which are in the maintelephone-circuit. A curved arm K, of brass or other non-magneticmaterial, is inserted in the handle A and is held in place by a screw m,passing through a slot in the said arm and into the curved end of themagnet B, also by a block '11, attached to the side of the arm K andadapted to slide between the arms of the magnet. The curved arm Kcarries at its free end a diaphragm-cell L, containing the diaphragm M,the said diaphragm being preferably made of pine or other resonant woodprotected by a coating of shellac or other water-resisting material.

To the diaphragm M are secured carbon bars N N which are bored toreceive the ends of the carbon-rods O. The said carbonrods are pressedtoward the diaphragm by a cushion P, of absorbent material, such as feltor cotton. The bars N N are connected up with the local battery and theprimary Wire of the induction-coil.

In the modified form of telephone shown in Fig. 4 the extremities of theU-magnet h are bent laterally and perforated to receive the screws 1'.The bobbins j are mounted upon right-angled pole-pieces which areslotted to receive the screws 1', entering the angled ends of the magnet71.. The part of the angled pole-piece upon which the wire is wound isformed of series of soft-iron pins 1', projecting from the slottedportion of the polepiece. In other respects the telephone 1s similar tothe receiver B. (Shown in Fig. 2.)

In the form shown in Figs. 6 and 7 the bobbinsj are mounted upon polarextensions 10 which are secured to the end of the U-magnet It by screwsinserted in the slotted ends of the set-screws, as shown in Fig. 7.Inthe modification shown in Figs. 8, 9, and 10 the angled plates 70*,which support the bobbins i are attached to the sides of the U-magnets hand the cores of the bobbins, which form a part of the angled plates,are formed of iron rods, as in the other case. To the magnet h issecured an externally threaded collar 2 to which is fitted thediaphragm-cell f, which is capable of being adjusted by turning the cellupon the collar, thereby causing the diaphragm g contained by the cellto approach or recede from the poles of the magnet.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In a telephone -receiver, a pole -piece formed ofseries of round rods or wires of different diameters attached to thepole of a permanent magnet and forming an oblong core adapted to receivethe bobbins, substantially as specified.

2. In a combined telephone transmitter and receiver, the combination ofthe tubular insulating-handle A, the U-magnet B, having the lateralpole-pieces O, the bobbins J placed on the pole-pieces, thediaphragm-cell F, the

diaphragm H, and adjustable curved arm K, the diaphragm-cell L, thediaphragm M, the perforated carbon bars N N, the carbon-rods O,and thecushion P,substantiallyas specified.

3. In a combined telephone transmitter and receiver, the combination ofthe tubular insulating-handle A, the U-magnet B, having the lateralpole-pieces C, the screw-threaded ring D, the screw-threaded collar E,fitted to I0 the ring D, the diaphragm-cell F, hinged to the collar E,the diaphragm H, and curved arm K, the bobbins J, placed on thepolepieces 0, the diaphragm-cell L, the diaphragm M, the perforatedcarbon bars N N, the carbon-rods O, and the cushion P, substantially I 5as specified.

ELOY NORIEGA. lVitnesses:

LUIs SANTA MARINA, Josi: GARCIA.

